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Modeling, Analysis, and Design of Distributed Power Electronics System Based on Building Block Concept
(Virginia Tech, 1999-05-24)
The basic Power Electronics Building Block (PEBB) configurations are identified and conceptual PEBB modules are constructed and tested. Using the INCA (Inductance Calculator) parasitic extraction and the Saber circuit ...
Low Voltage High Current Power Conversion with Integrated Magnetics
(Virginia Tech, 1998-04-27)
Very low voltage, high current output requirement have necessitated improvements in power supply's density and efficiency. Existing power conversion techniques cannot meet very stringent size and efficiency requirements. ...
Advanced Single-Stage Power Factor Correction Techniques
(Virginia Tech, 1997-09-25)
Five new single-stage power factor correction (PFC) techniques are developed for single-phase applications. These converters are: Integrated single-stage PFC converters, voltage source charge pump power factor correction ...
Harmonic Reduction IN a Single-Switch Three-Phase Boost Rectifier With Harmonic-Injected PWM
(Virginia Tech, 1997-02-04)
A constant switching frequency with the sixth-order harmonic injection PWM concept is established, and a sixth-order harmonic injection technique is developed for the harmonic reduction of a single-switch three-phase boost ...
Analysis and Design of High-Intensity-Discharge Lamp Ballast for Automotive Headlamp
(Virginia Tech, 2001-11-19)
The High-Intensity-Discharge Lamps (HID), consisting of a broad range of gas discharge lamps, are notable for their high luminous efficacy, good color rendering, and long life. Metal halide lamps have the best combination ...
Low-voltage High-efficiency Fast-transient Voltage regulator Module
(Virginia Tech, 1999-07-02)
In order to meet demands for faster and more efficient data processing, modern microprocessors are being designed with lower voltage implementations. The processor voltage supply in future generation processors will decrease ...
High-Frequency Dimensional Effects in Ferrite-Core Magnetic Devices
(Virginia Tech, 1996-10-04)
MnZn ferrites are widely used in power electronics applications where the switching frequency is in the range of several tens of kilohertz to a megahertz. In this range of frequencies the combination of relatively high ...
High Performance Power Converter Systems for Nonlinear and Unbalanced Load/Source
(Virginia Tech, 1998-11-17)
This dissertation covers three levels of issues and solutions dealing with unbalanced and/or nonlinear situations in power electronic systems, namely power converter level, power converter system level, and large-scale ...
Design and Analysis of Piezoelectric Transformer Converters
(Virginia Tech, 1997-05-20)
Piezoelectric ceramics are characterized as smart materials and have been widely used in the area of actuators and sensors. The principle operation of a piezoelectric transformer (PT) is a combined function of actuators ...
Electrical, Thermal, and EMI Designs of High-Density, Low-Profile Power Supplies
(Virginia Tech, 1998-02-17)
This work presents the analyses and designs of high-density, low-profile power supplies, including the electrical, thermal, and EMI aspects. Emphasis is placed on forward and flyback converters.
The efficiency improvements ...